diff --git a/shopinvader/models/product_product.py b/shopinvader/models/product_product.py
index 6bc6a3401c..c94816b44f 100644
--- a/shopinvader/models/product_product.py
+++ b/shopinvader/models/product_product.py
@@ -84,3 +84,9 @@ def _get_invader_variant(self, backend, lang):
         return self.shopinvader_bind_ids.filtered(
             lambda x: x.backend_id == backend and x.lang_id.code == lang
         )
+
+    def unlink(self):
+        # Call unlink manually to be sure to trigger
+        # shopinvader variant unlink constraint
+        self.mapped("shopinvader_bind_ids").unlink()
+        return super(ProductProduct, self).unlink()
diff --git a/shopinvader/models/shopinvader_product.py b/shopinvader/models/shopinvader_product.py
index 89e1954981..ef32627365 100644
--- a/shopinvader/models/shopinvader_product.py
+++ b/shopinvader/models/shopinvader_product.py
@@ -199,3 +199,9 @@ def _redirect_existing_url(self):
                     }
                 )
         return True
+
+    def unlink(self):
+        # Call unlink manually to be sure to trigger
+        # shopinvader variant unlink constraint
+        self.mapped("shopinvader_variant_ids").unlink()
+        return super(ShopinvaderProduct, self).unlink()
diff --git a/shopinvader_search_engine/tests/__init__.py b/shopinvader_search_engine/tests/__init__.py
new file mode 100644
index 0000000000..018e2cc529
--- /dev/null
+++ b/shopinvader_search_engine/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_delete_product
diff --git a/shopinvader_search_engine/tests/test_delete_product.py b/shopinvader_search_engine/tests/test_delete_product.py
new file mode 100644
index 0000000000..2f76f4814f
--- /dev/null
+++ b/shopinvader_search_engine/tests/test_delete_product.py
@@ -0,0 +1,64 @@
+# Copyright 2019 Akretion (http://www.akretion.com).
+# @author Sébastien BEAU <sebastien.beau@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo.exceptions import UserError
+from odoo.tests import SavepointCase
+
+
+class BindingCase(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super(BindingCase, cls).setUpClass()
+        cls.template = cls.env["product.template"].create({"name": "Test"})
+        cls.product = cls.template.product_variant_ids
+        cls.shopinvader_product = (
+            cls.env["shopinvader.product"]
+            .with_context(map_children=True)
+            .create(
+                {
+                    "record_id": cls.template.id,
+                    "backend_id": cls.env.ref("shopinvader.backend_1").id,
+                    "lang_id": cls.env.ref("base.lang_en").id,
+                }
+            )
+        )
+        cls.shopinvader_variant = (
+            cls.shopinvader_product.shopinvader_variant_ids
+        )
+
+
+class BindingDoneCase(BindingCase):
+    @classmethod
+    def setUpClass(cls):
+        super(BindingDoneCase, cls).setUpClass()
+        cls.shopinvader_variant.write({"sync_state": "done"})
+
+    def test_unlink_shopinvader_product(self):
+        with self.assertRaises(UserError):
+            self.shopinvader_product.unlink()
+
+    def test_unlink_product_product(self):
+        with self.assertRaises(UserError):
+            self.product.unlink()
+
+    def test_unlink_product_template(self):
+        with self.assertRaises(UserError):
+            self.template.unlink()
+
+
+class BindingInactiveDoneCase(BindingCase):
+    @classmethod
+    def setUpClass(cls):
+        super(BindingInactiveDoneCase, cls).setUpClass()
+        cls.shopinvader_variant.active = False
+        cls.shopinvader_variant.sync_state = "done"
+
+    def test_unlink_shopinvader_product(self):
+        self.shopinvader_product.unlink()
+
+    def test_unlink_product_product(self):
+        self.product.unlink()
+
+    def test_unlink_product_template(self):
+        self.template.unlink()